Include external/wpt/css/css-break/ in layout_ng_block_frag test suite.

Bug: 829028
Change-Id: I5e46f41b25bc0810b31e4b2e9814aeff425f8088
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1928789Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Morten Stenshorne <mstensho@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717769}

third_party/blink/web_tests/TestExpectations

@@ -875,7 +875,14 @@ crbug.com/591099 virtual/layout_ng_block_frag/fast/multicol/flowthread-with-floa
 crbug.com/797591 virtual/layout_ng_block_frag/fast/multicol/regular-block-becomes-multicol.html [ Failure ]
 crbug.com/797591 virtual/layout_ng_block_frag/fast/multicol/newmulticol/regular-block-becomes-multicol.html [ Failure ]
 
-### Missing refs, these are also skipped for existing layout.
+### With LayoutNGBlockFragmentation enabled:
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/block-end-aligned-abspos-with-overflow.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/floats-and-text-narrow-and-short-dynamic.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/line-after-unbreakable-float-after-padding.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/widows-orphans-001.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/widows-orphans-002.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/widows-orphans-003.html [ Failure ]
+crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-break/widows-orphans-004.html [ Failure ]
 crbug.com/967329 virtual/layout_ng_block_frag/external/wpt/css/css-multicol/columnfill-auto-max-height-002.html [ Failure ]
 crbug.com/967329 virtual/layout_ng_block_frag/external/wpt/css/css-multicol/columnfill-auto-max-height-001.html [ Failure ]
 crbug.com/829028 virtual/layout_ng_block_frag/external/wpt/css/css-multicol/float-and-block.html [ Failure ]

third_party/blink/web_tests/VirtualTestSuites

@@ -186,7 +186,8 @@
   },
   {
     "prefix": "layout_ng_block_frag",
-    "bases": ["external/wpt/css/css-multicol",
+    "bases": ["external/wpt/css/css-break",
+              "external/wpt/css/css-multicol",
               "fast/multicol",
               "fragmentation",
               "printing"],

third_party/blink/web_tests/virtual/layout_ng_block_frag/external/wpt/css/css-break/README.txt

+# The LayoutNG project is described here: http://goo.gl/1hwhfX